What was the score of united states player wally armstrong when he had a To par of +1
CREATE TABLE "third_round" (
  "place" text,
  "player" text,
  "country" text,
  "score" text,
  "to_par" text
);
SELECT "score" FROM "third_round" WHERE "country"='united states' AND "to_par"='+1' AND "player"='wally armstrong';