/usr/bin/javafxpackager is in openjfx 8u161-b12-1ubuntu2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/bin/../lib/jvm/java-8-openjdk-amd64/bin/javafxpackager
/usr/bin/../lib/jvm/java-8-openjdk-amd64/bin/javafxpackager