CREATE TABLE table_name_72 (goal_difference INTEGER, played VARCHAR(255), goals_against VARCHAR(255), position VARCHAR(255))
What is the highest Goal Difference when the goals against were less than 76, and the position larger than 5, and a Played larger than 30?
    
SQL: SELECT MAX(goal_difference) FROM table_name_72 WHERE goals_against < 76 AND position > 5 AND played > 30