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_75 ( position INTEGER, points_1 VARCHAR, goals_against VARCHAR )

### Question ###
What is the lowest Position, when Points 1 is '39', and when Goals Against is greater than 49?

### Accurate SQL ###

SELECT MIN(position) FROM table_name_75 WHERE points_1 = "39" AND goals_against > 49