The Nittany Lions move up one spot from No. 7 overall last week.
Robinson will undergo surgery and miss the remainder of 2022 season.
The Nittany Lions will host the first and second rounds of the NCAA Tournament in Rec Hall.
Fourteen kills from Katie Clark helped propel the Nittany Lions to a win in their regular-season finale.
Jalen Pickett's 18 points and Seth Lundy's 15 points led the way for the Nittany Lions to earn their sixth win of the season.
Leilani Kapinus hit two clutch free throws at the buzzer to advance Penn State to 6-0.