I agree with Ben, Rob, Dubbya, ect. I'm putting another arrow in that deer to get more trauma to his system. Hopefully I can get an artery, spine or into the cavity.
I would shoot if I had the time to range it and take a steady shot. To just pull out an arrow and fling one out there would be a waste of a good arrow.
I would not take a 75 yard shot at the deer. To hit it well would be a miracle. I'd wait until morning then track it.