CREATE TABLE table_7217 ("Date" TEXT, "Tournament" TEXT, "Winning score" TEXT, "Margin of victory" TEXT, "Runner ( s ) -up" TEXT)

What was the winning score for the tournament where Garth Mulroy was the runner-up?
SELECT "Winning score" FROM table_7217 WHERE "Runner(s)-up" = 'garth mulroy'
SELECT "Winning score" FROM "table_7217" WHERE "Runner(s)-up" = 'garth mulroy'