I don't really know this player but judging from yesterday's match against Germany he seemed to be rather physical in one-on-one situations. He used his body very effective against faster players like Özil and Schürrle, so BB 76 seems kinda low there.
I think 79 would look good, and don't underestimate Özil, since his transfer to Real he worked hard on his physical power and I think lately he shows his improved body language more often. It's in no comparison to his Bundesliga-years I guess.
I'd rather see him at 78 because I think he does know how to play physical but he doesn't use it very well especially when he's attacking... a higher BB would make him also a better attacker as well since he could outmuscle quite alot of sidebacks with the rating of 79