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_90 (number INTEGER, name VARCHAR, year_end VARCHAR)
### Question:
Which Number has a Name of cooper, c. kenneth, and a Year End larger than 1984?
### Answer:
SELECT AVG(number) FROM table_name_90 WHERE name = "cooper, c. kenneth" AND year_end > 1984