2002 Honda Accord Timing belt change

Engine Mechanical problem
2002 Honda Accord 4 cyl Front Wheel Drive Automatic 67800 miles

The Honda dealership is recommending that we change the timing belt even though the mileage is way below the recommended 90,000. We bought the car (new) in November 2001 and per the dealer the timing belt should be changed at 7 years or 90,000.

Is that correct? If we do need to replace, what should be the ball park cost?

Thanks