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_71 ( jersey__number INTEGER, name VARCHAR, weight__kg_ VARCHAR )

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

### Accurate SQL ###

SELECT AVG(jersey__number) FROM table_name_71 WHERE name = "steve griffith" AND weight__kg_ < 84