What was the average Jersey number of the player for the Calgary Flames, whose Weight (kg) was greater than 84?
CREATE TABLE "list_of_united_states_national_ice_hocke" (
  "position" text,
  "jersey_number" real,
  "name_v_t_e" text,
  "height_cm" real,
  "weight_kg" real,
  "birthplace" text,
  "1995_96_team" text
);
SELECT AVG("jersey_number") FROM "list_of_united_states_national_ice_hocke" WHERE "1995_96_team"='calgary flames' AND "weight_kg">84;