Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_name_88 ( long INTEGER, avg_g VARCHAR, gp_gs VARCHAR )

### Question ###
Name the highest Long that has an Avg/G smaller than 8.4, and an GP-GS of 4 0?

### Accurate SQL ###

SELECT MAX(long) FROM table_name_88 WHERE avg_g < 8.4 AND gp_gs = "4–0"