When the percent is larger than 0.685, what is the average number of points scored?
CREATE TABLE "yearly_results" (
  "season" text,
  "games" real,
  "lost" real,
  "tied" real,
  "points" real,
  "pct_pct" real,
  "goals_for" real,
  "goals_against" real,
  "standing" text
);
SELECT AVG("points") FROM "yearly_results" WHERE "pct_pct">0.685;