CREATE TABLE table_14880 ("Date" TEXT, "Tournament" TEXT, "Winning score" TEXT, "To par" TEXT, "Margin of victory" TEXT, "Runner ( s ) -up" TEXT)

When the Winning score is 74-68-67-75=284, what was the Margin of victory?
SELECT "Margin of victory" FROM table_14880 WHERE "Winning score" = '74-68-67-75=284'
SELECT "Margin of victory" FROM "table_14880" WHERE "Winning score" = '74-68-67-75=284'