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

### Instruction:
What was the average Jersey # of Steve Griffith, when his Weight (kg) was less than 84?

### Inputs:
table_name: table, columns: ['Position', 'Jersey #', 'Name', 'Height (cm)', 'Weight (kg)', 'Birthdate', 'Birthplace', 'Previous Club/Team']

### Response:
SELECT AVG Jersey # FROM table WHERE Name = steve griffith AND Weight (kg) < 84