UT-Chattanooga has stepped up defensively holding their last three foes to a respectable 68.3 points a game. 
East Tennessee State has a top-70 defense allowing fewer than 66 points per game. The Mocs haven't played too many defenses of this caliber. The Buccaneers' offensive numbers are inflated because of a recent 112-84 blowout victory against The Citadel. 
This is a Southern League matchup so the oddsmaker isn't doing a deep dive into this game. He's just set a total based on season statistics. In this case, the number is set too high.