What's the number of the player with 68.46 (1144 pts) in riding?
CREATE TABLE "men" (
  "num" real,
  "athlete_noc" text,
  "shooting" text,
  "fencing" text,
  "swimming" text,
  "riding" text,
  "running" text,
  "total" real
);
SELECT MAX("num") FROM "men" WHERE "riding"='68.46 (1144 pts)';