The win snapped a four-game losing streak to the Flames.
Fox hit a 3-pointer with 11:17 left that got High Point even at 45-45. After trading layups, Fox hit a jumper, two free throws and a 3 to give the Panthers a 54-47 lead.
Proctor was 8 of 17 from the field, including 3 of 6 from deep, to finish with 24 points and six assists. Fox was 7 of 13 from the floor and 5 of 7 from deep to tally 22 points. The pair were the only Panthers (9-9, 4-3) to hit from distance. Justyn Mutts grabbed 10 boards and dished five assists.
Mannion, who recently reclassified and is ESPN's No.11 overall player in the class of 2019, chose Arizona over Marquette.
He'll fit in with Sean Miller's plans for a faster tempo on offense.
The cream of the crop of American high school basketball will congregate in Colorado Springs from Oct. 5-7, as USA Basketball unveils its newly expanded Junior National Team minicamp in collaboration with the NBA, NCAA and NBPA.