Cooling an apt with one AC?

I am on the top floor and I get hotter temps. Not enough air blows through, it gets stuffy with no AC at anything over 60 degrees. I need AC for 7 months a year.

Just cleaned the filter yesterday and after that, today, it has been struggling and I put it down to 64. Feels like the thing is dying and I may roast tonight.

I think I’m going to get 2 more tower fans and try to push some air.

And get a new AC.