user: Question: What is the sum of Goals Against, when Lost is 45, and when Points is greater than 68?
Columns: ['Season', 'Games', 'Lost', 'Points', 'Pct %', 'Goals for', 'Goals against', 'Playoffs']
Types: ['text', 'real', 'real', 'real', 'real', 'real', 'real', 'text']
Sample row: ['1990–91', 83.0, 45.0, 68.0, 0.41, 273.0, 362.0, 'Out of Playoffs']
SQL:

assistant: SELECT SUM("Goals against") FROM "Table" WHERE "Lost" = 45.0 AND "Points" > 68.0;