I'd say your fine. Before I got my AC with built in de-humidifier I'd get almost 90 in the room and be 7-10 warmer in my box. It certainly isn't ideal and the plants definatly grow better at lower temps, but I don't think you'll kill it or stunt it's growth at all. Mine was running hot for weeks before I got an AC unit. Mine still did ok. I just harvested on Monday. My autos are almost five weeks along now, but were super crowded the first four and only one of the 8 look as good as yours.
Check to see if you AC unit has a "dry" mode. I had a dehumidifier going in the closet too until I noticed that option. Now it fills a lil resevoir I have to dump. Idk if that's a common option or not. It's my first portable AC unit iv ever owned. I grew up up north. We had portable heaters instead, lol.