G98 - take back to the position in which the axis was located immediately before the start of this series of one or more continuous continuous cycles.
G98 specifies a reset. G98 causes the tool to move to the position where it started the cycle.
G99 specifies the return to the reference point or safe retraction zone. G99 causes the tool to move to the point defined by the R parameter in the block with the hard cycle function.