http://i41.tinypic.com/35cjuqq.png
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From tables I found that 98% of the normal distribution is less than 2.055 standard deviations above the mean so the cutoff for the lightest 2% will be 2.055 standard deviations below the mean.
3420 - 2.055 x 496 = 2401 grams (to the nearest gram). This answer could be out by a few grams because the tables I have are only accurate to 3 significant figures.
3420 - 2.055 x 496 = 2401 grams (to the nearest gram). This answer could be out by a few grams because the tables I have are only accurate to 3 significant figures.