Is a 75 KHz 12V peak signal suitable for LM324N?
There are a couple of problems with what you are trying to do:


The slew rate is not sufficient to pass a 75kHz 12Vp signal.  The max rate of change of your input signal is the max of the derivative of 12*sin(wt) or max(12*w*cos(wt)), which is 12*w or 5.6V/us.  Look at Fig 11 in the datasheet.
The max output signal swing is (typically) the supply rail minus 1.5V, so a buffer with +/-12V supplies will not be able to reproduce a 12Vp sinewave.