Short answer is that 76 is too high for any of the yeasts I am aware of.
Some other factors to consider, is that the sunlight is not good for your beer (skunky smells), also, I have found that ramping the temperature up and down on yeast is worse than fermenting warm.
So I would find a spot that is fairly constant temperature, place the carboy into a pool of water, stick a t-shirt over the carboy(to wick up the water out of the pool or tub of water) and put a fan on the carboy.... as long as it is not too humid, you will drop 2 to 4 degrees off of your temps.
Another possibility I have seen is to take a large garbage can, fill it with water, and put the carboy into the water (keep the beer line in the carboy above the water line so that the carboy will not float.) And then put frozen gallon jugs water into the water. The blocks of ice will melt at a fairly constant rate and with a little experimentation, you can add jugs at a constant rate to keep the temps down.