CREATE TABLE table_12407546_1 (_number INT, riding VARCHAR)

What's the number of the player with 68.46 (1144 pts) in riding?
SELECT MAX(_number) FROM table_12407546_1 WHERE riding = "68.46 (1144 pts)"
SELECT MAX("_number") FROM "table_12407546_1" WHERE "68.46 (1144 pts)" = "riding"