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_68 (effic INTEGER, avg_g VARCHAR)
### Question:
What is the highest effic with an avg/g of 91.9?
### Answer:
SELECT MAX(effic) FROM table_name_68 WHERE avg_g = 91.9