What was the away score with a win% of 0.75 and average total/home attendance of 4,686 (18,744)?
CREATE TABLE "year_by_year_performance" (
  "coach" text,
  "season" text,
  "record" text,
  "home" text,
  "away" text,
  "win_pct" real,
  "average_total_home_attendance" text
);
SELECT "away" FROM "year_by_year_performance" WHERE "win_pct"=0.75 AND "average_total_home_attendance"='4,686 (18,744)';