His range should be 0-2 feet, and, effective range, 0 feet. Good news, he knows it, and throws it down 95% of the time. Props to McHale on how he and Capella understand what to do, Dunk, Dunk, Dunk, and when in doubt, Dunk.
It was wrong to put him in at the 5, it's just not his natural position plus he's still a rookie. He's better as a roving 4. He does have some post-up skills but he's better at clean-up work.
He hasn't taken any shots outside of 10 feet according to bkref, but his FG% at short range is excellent. http://www.basketball-reference.com/players/h/harremo01.html