CREATE TABLE table_name_15 (average INT, number_of_dances VARCHAR, total VARCHAR)

What is the highest average that has 6 dances and a total of over 128?
SELECT MAX(average) FROM table_name_15 WHERE number_of_dances = 6 AND total > 128
SELECT MAX("average") FROM "table_name_15" WHERE "number_of_dances" = 6 AND "total" > 128