Okay. I wouldn't let the RH get any higher if you can control it. Make sure you have good air circulation, the branches on the plant should move around just slightly in the wind. But give it time to finish out and it should do you well. Don't chop it yet, you would regret it.
Also don't be afraid to do some reading up on Leds. They can be expensive but are better off for certain types of grows.
Me for example, I'm in a 5x5 tent with an air cooled 600watt hps and still had to buy an AC to vent into my tent because temps were getting way too high. So now I'm running an extra 800 watts from the A.C. just to keep temps under control. I will be looking to convert to leds mainly because of this, heat is generally not an issue with them.