What is the To par score corresponding to the winning score of 64-69-67-66=266?
CREATE TABLE "pga_tour_wins_8" (
  "date" text,
  "tournament" text,
  "winning_score" text,
  "to_par" text,
  "margin_of_victory" text,
  "runner_s_up" text
);
SELECT "to_par" FROM "pga_tour_wins_8" WHERE "winning_score"='64-69-67-66=266';