Temp too hot?

So, our AC went out last Friday and is finally getting replaced tomorrow. It’s mostly been okay in our house (around 78) but today it was 92 degrees outside and our house is currently 84. In my son’s room the monitor says it’s 86 (though I think it runs a degree or 2 high because it’s placed so high up on the wall) and I’m worried about him sleeping in there tonight. We have 2 fans going in his room, but it’s still so hot. He already runs hot and we usually keep our house around 72. Do you think he’ll be okay for tonight?