Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_name_72 (spike INTEGER, weight VARCHAR, block VARCHAR)
### Question:
What is the sum of Spike when the Weight was more than 84, and Block was less than 315?
### Answer:
SELECT SUM(spike) FROM table_name_72 WHERE weight > 84 AND block < 315