Answer
Please see the work below.
Work Step by Step
We know that the gravitational force is given as
$F=\frac{GMm}{r^2}$
We plug in the known values to obtain:
$F=\frac{6.67\times 10^{-11}(67)(73000)}{(84)^2}$
$F=4.6\times 10^{-8}N$
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