Would be hard to say without REALY knowing the land lay out, did he jump the fence or try ? After a 85 yard run after a shot I wound t think he would try the fence but if he did you should defanatly know it, ( hair in the fence, stumbling tracks on the other side) anyways 99 % of the time they look for easy and always flat or down hill, very rare will a fatally hurt deer that I've ever seen or heard of go up hill. I would guess with your shot description your deer is 100 to 200 yards out, I'm guessing you could have clipped the back of the lungs or opened the chest cavedy up to the gut cavedy area, alot would depend on the color of the blood and good clean lung shots are realy bubbley.