Even though the cat is out of the bag (nice shot BTW Jeff) I'll through my $.02 in here.

On a quartering away shot as you described, I would have put the "pipper" (sorry...been watching "Dog Fights" on the History channel)about 2-3 inches forward and slightly higher than your entrance hole as I would want to get right in the middle of the vitals. This would put my entrance somewhere between your hit and Greg's green dot only higher.

You can't argue with the results though, I believe you said you took out one lung and the heart right? Unless the deer was quartering more than I'm thinking, you probably took out the lower backside of the heart? If you hit right trough the middle of the heart then (judging by the entrance hole) the deer was quartering more than I understood it to have been.