CHARLESTON, S.C. — Chad Tomko scored 21 points and North Carolina-Wilmington held Penn State to 32.3 percent shooting to knock off the Nittany Lions 80-69 on Thursday. ‘‘Our kids played well,’’ Seahawks coach Benny Moss said. ‘‘We played with great effort and we executed. We handled Penn State’s runs in the second half. When they made a run at us, I thought we kept our composure, got the shots we were looking for and just kept defending.’’ UNC-Wilmington (2-1) shot 57.4 percent from the field (27-for-47) and made 10 of 16 3-point shots in the first round of the Charleston Classic. ‘‘Once you hit your first couple, you get confidence,’’ said Tomko, who made six 3-pointers in nine attempts. ‘‘I had confidence in my shot tonight.’’ Penn State (2-1) got 29 points from Talor Battle, who made 11 of 12 free throws. The Nittany Lions were 22-for-27 from the foul line for the game, but 21-for-65 from the field.