What is the total of the team with a T score greater than 8 and an E score less than 8.4?
CREATE TABLE "group_3_balls_2_ropes" (
  "nation" text,
  "t_score" real,
  "a_score" real,
  "e_score" real,
  "total" real
);
SELECT SUM("total") FROM "group_3_balls_2_ropes" WHERE "t_score">8 AND "e_score"<8.4;