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_15 (average INTEGER, number_of_dances VARCHAR, total VARCHAR)
### Question:
What is the highest average that has 6 dances and a total of over 128?
### Answer:
SELECT MAX(average) FROM table_name_15 WHERE number_of_dances = 6 AND total > 128