Below is an instruction that describes a task. Write a response that appropriately completes the request.

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

### Inputs:
table_name: table, columns: ['Name', 'GP-GS', 'Gain', 'Loss', 'Long', 'Avg/G']

### Response:
SELECT MAX Long FROM table WHERE Avg/G < 8.4 AND GP-GS = 4–0