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

### Instruction:
What is the sum of Goals Against, when Lost is 45, and when Points is greater than 68?

### Inputs:
table_name: table, columns: ['Season', 'Games', 'Lost', 'Points', 'Pct %', 'Goals for', 'Goals against', 'Playoffs']

### Response:
SELECT SUM Goals against FROM table WHERE Lost = 45 AND Points > 68