The future balances will increase to
(initial balance) x ( (1 + interest rate) ^ (# of years compounded) )
For your older sister, this is 2000 x ( 1.065 ^ 5), where ^ means 'raised to the power'.
For you this is B x ( 1.06 ^ 5)
At end of 5 years,
sister has $2000 x 1.037 = $2740.17
you have B x 1.33823.
So, in order to end up with the same balance as sister,
B x 1.33823 must = $2740.17, or
B = $2740.17 / 1.33823
B = 2047.62 must be your approximate initial balance.
So, the answer is $47.62 is how much more money must you deposit today.