I think that's anexcellent picture... if I had shot that deer at that angle, I would have been pretty confident of the placement. I might of thought it wasa little high, but in my mind, that would have been a dead deer walking!
As far as trying to explain to folks the area we're talking about, that pics says it all. It also appears that arrow shot was from a ground blind or something similar. A shot like that from a tree stand would have angled low enough to get one of the lungs anyway.

Some might not believe this story and it's not exactly a crossbow topic... but I once shot a small 8 point with a Remington Copper Sabot 2 3/4" (Remington 11-87 fully rifled barrel with a 4x scope) when they first came out (early 90's) This buck had spooked w/ a doe from the next woods over and was standing in the middle of a field so nobody could sneak up on them. I estimated the shot at 150 yards (woodchuck hunting was my absolute favorite thing to do, so I was pretty sure of the yardage) I put the crosshairs 12" above his back and let one fly... drilled him in his armpit, just behind his leg. I let him sit for a while (20 mins - not really long enough, but I was young and excited) When I walked up on him he was just standing there like he just got done sprinting a mile. He couldn't catch his breathe, I finished him off, but upon gutting him, that bullet only went in there less than 8" as it had no power left and the pedals didn't open up, so he was quite "frisky" yet, with one lung still working fine. Like I said earlier.. they are a tough, amazing animal.