What is the height of the player born on June 24, 1964, with a weight over 84 kg?
CREATE TABLE "list_of_united_states_national_ice_hocke" (
  "position" text,
  "jersey_num" real,
  "name" text,
  "height_cm" real,
  "weight_kg" real,
  "birthdate" text,
  "birthplace" text,
  "1986_1987_team" text
);
SELECT AVG("height_cm") FROM "list_of_united_states_national_ice_hocke" WHERE "weight_kg">84 AND "birthdate"='june 24, 1964';