CREATE TABLE table_name_72 (spike NUMBER, weight VARCHAR2, block VARCHAR2)

What is the sum of Spike when the Weight was more than 84, and Block was less than 315?
SELECT SUM(spike) FROM table_name_72 WHERE weight > 84 AND block < 315
SELECT SUM("spike") FROM "table_name_72" WHERE "block" < 315 AND "weight" > 84