I think the oddsmaker was too influenced by Boston College's last game - a 94-90 home win against Notre Dame - when he set this total. The Eagles had averaged just 65.6 points during their previous three games. 
Florida State is a high-scoring team, but the Seminoles also can play tough defense especially at home where they've held three of their last four opponents to 61 or fewer points. 
This game figures to be a Florida State blowout. So it gives the Seminoles a chance to reduce the minutes of their starters providing extra time for their backup players.