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_59 (net_yds INTEGER, long VARCHAR, start VARCHAR)
### Question:
What is the average net yds for the player who had a long of 68 and started after 1984?
### Answer:
SELECT AVG(net_yds) FROM table_name_59 WHERE long = 68 AND start > 1984