UNCW (2-1) opened the second half with a 9-0 burst sparked by a Jackson 3-pointer to make it 55-45 with 18:11 to go.
Jackson shot 12 of 21 from the floor in the win, the first triple-digit score for the Seahawks since a 115-95 victory over VMI in 2009.
VMI (2-2), which made 13 of 29 3-pointers, was led by QJ Peterson with 27 points. He was 8 of 17 from the floor, hitting all three of his 3's, and made 8 of 10 free throws. Tim Marshall added 17 and Brian Brown 16.