I suspect it would make little difference. For a number of reasons.
Once someone worked out what it was, it would be whisked away so fast no-one in NASA would ever realise it was there, and vanish into the bowels of the NSA (or its predecessor) to spend the rest of its operational life cracking codes, and maybe helping design nukes.
Even if NASA was able to keep it, it would take years to develop useful software to run on it. Excel isn’t some magical beast, you need to understand serious mathematics and engineering to develop the algorithms. There was incipient understanding at this time - Fortran already existed and there were programmers using it to do work. But the time needed to create software that was useful and could use the serious power of a modern machine would take years no matter what. Indeed this is the story of modern computing. Algorithms and in engineering the validation and testing of implementations takes a lot of effort. For most people processor power has vastly outstretched their ability to usefully use it.
Forget Excel. That isn’t a useful tool. A copy of Matlab or NASTRAN on the other hand would be useful. But the lead time to develop the skills to use them would see you most of the way through the program before you saw any contribution.
Most engineers in NASA were mostly aeronautical, mechanical, and some electronic. But they were mostly engineers, not scientists. Most of these guys would have very little useful expertise to throw at the problem of understanding or using the machine. It would go to MIT or somewhere similar, where scientists would investigate it very carefully. All the guys at NASA (and all the contractors that did the lion’s share of the engineering for Apollo anyway) would get on with their jobs.
But the biggie. About the time someone realised that this device has come from the future all bets would be off. Someone has a time machine. And they have it only a few decades from now. Whoo hooo!! Brits, Ozzies, and US Sci Fi fans will know what the Torchwood Institute was set up for. About ten seconds after you send the machine back in time the black helicopters will arrive. Then you won’t have a time machine any more.