  Five dimensional black hole solutions that describe the QCD crossover
transition seen in $(2+1)$-flavor lattice QCD calculations at zero and nonzero
baryon densities are used to obtain predictions for the baryon susceptibility,
baryon conductivity, baryon diffusion constant, and thermal conductivity of the
strongly coupled quark-gluon plasma in the range of temperatures
$130\,\textrm{MeV}\le T\le 300\,\textrm{MeV}$ and baryon chemical potentials
$0\le \mu_B \le 400\,\textrm{MeV}$. Diffusive transport is predicted to be
suppressed in this region of the QCD phase diagram, which is consistent with
the existence of a critical end point at larger baryon densities. We also
calculate the fourth-order baryon susceptibility at zero baryon chemical
potential and find quantitative agreement with recent lattice results. The
baryon transport coefficients computed in this paper can be readily implemented
in state-of-the-art hydrodynamic codes used to investigate the dense QGP
currently produced at RHIC's low energy beam scan.
